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Finding the Fourth Proportional to 485,567.60, 670,231.44 and 281,670.08

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Solution

The fourth proportional to 485,567.60, 670,231.44 and 281,670.08 is: 388,790.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,567.60 : 670,231.44 = 281,670.08 : x
  2. Step 2: Convert to fraction form
    485,567.60/670,231.44 = 281,670.08/x
  3. Step 3: Cross multiply
    485,567.60x = 670,231.44 × 281,670.08
  4. Step 4: Simplify right side
    485,567.60x = 188,784,143,323.32
  5. Step 5: Solve for x
    x = 188,784,143,323.32/485,567.60
  6. Step 6: Final answer
    x = 388,790.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.